Roache will play the new assistant district attorney who succeeds Jack McCoy (Sam Waterston) after McCoy's promotion to DA.

Roache is one of two new major casting additions to the Wolf Films/Universal Media Studios-produced drama this season, along with Jeremy Sisto, whose character replaced Govich's Detective Nina Cassady.

It's a reunion for Sisto and Roache, who starred together on NBC's "Kidnapped" last season.

On "Brothers," from ABC Studios, Glover will play a new love interest to Sally Field.

On "House," Wilde, Penn, Jacobson and Dudek are expected to play characters who will be brought in after the resignations of House's (Hugh Laurie) underlings Foreman (Omar Epps) and Cameron (Jennifer Morrison) and the firing of Chase (Jesse Spencer).

Wilde will play a young doctor called Thirteen who will be working closely with House on the series, which is from Universal Media Studios.

Wilde, who most recently was on NBC's "Black Donnellys," also had roles on Fox's "The O.C." and "Skin" and in the films "Alpha Dog" and "Turistas." She is repped by CAA, Kass & Stokes Management and attorney P.J. Shapiro.

Penn co-starred in the film "Harold & Kumar Go to White Castle" and its upcoming sequel and had a role last season on Fox's "24."

Jacobson is on the big screen in "Transformers" and most recently appeared on television in USA Network's miniseries "The Starter Wife."

Dudek most recently appeared in ABC's "Big Day" and also had a recurring role on Fox's "Bones."

Meanwhile, Govich is switching from detective work to the legal arena in "K-Ville." She will guest star as DA Lyndsey Swann on the 20th Century Fox Television-produced drama, which revolves around cops in post-Katrina New Orleans.

Govich, whose credits also include roles on FX's "Rescue Me" and NBC's "Conviction," is repped by the Gersh Agency and Ken Treusch of Bleecker Street Entertainment.